The filing is for the Explorer Edition hardware, which is what Google will provide to developers who pre-ordered devices at Google I/O last year. Certification details for the Bluetooth module included the diagram pictured above.

Unfortunately, that's the only image of the actual device in these filings. Google filed a request with the FCC asking for short-term confidential treatment of a number of items, including external photos, test set-up photos, internal photos and the user manual. Google's request means that we won't see that information for at least 180 days.

With FCC certification, Google Glass is ever closer to becoming a reality.

Mashableis the largest independent news source covering digital culture, social media and technology.